CN105244581A - Rectangular waveguide-trapezoid height reduction transition-substrate integrated waveguide converter and assembling method thereof - Google Patents
Rectangular waveguide-trapezoid height reduction transition-substrate integrated waveguide converter and assembling method thereof Download PDFInfo
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Abstract
The present invention discloses a rectangular waveguide-trapezoid height reduction transition-substrate integrated waveguide converter which comprises a special waveguide which is provided with a heigth reduction waveguide groove and a substrate groove and a substrate integrated waveguide with a trapezoidal extending medium. The special waveguide is divided into upper and lower metal shells. The upper metal shell is provided with a height reduction waveguide groove, and the lower metal shell is provided with a substrate groove. The substrate integrated waveguide comprises the trapezoidal extending medium. The upper part of the trapezoidal extending medium is exposed and lower part of the trapezoidal extending medium is covered by a copper skin. The substrate integrated waveguide is placed in the substrate groove, thus the trapezoidal extending medium is at the center of the substrate groove laterally, the upper and lower metal shells of the special waveguide are used to press the substrate integrated waveguide tightly, and the conversion of the waveguide to the substrate integrated waveguide is completed. The rectangular waveguide-trapezoid height reduction transition-substrate integrated waveguide converter has the advantages of a wide frequency band, a low insertion loss and a low reflection coefficient, and a reliable solution can be provided for the testing of a high-frequency microwave RF circuit.
Description
Technical field
The present invention relates to a kind of special waveguide and side to have the substrate integration wave-guide of trapezoidal extension medium to carry out being communicated with the rectangular waveguide of rear formation-trapezoidal to subtract high transition-substrate integration wave-guide transducer, belong to microwave and millimeter wave passive device technical field.
Background technology
1865, maxwell combined the electrodynamics rule that Faraday's electromagnetism close range function thought and ampere are started, and summarizes electromagnetism rule, establish Theory of Electromagnetic Field by a set of equation group.Microwave circuit is developed so far based on Theory of Electromagnetic Field, no matter is in theory, or in material, technique, components and parts and designing technique etc., all developed very ripe, and application is more and more extensive.
Nearly ten years, substrate integration wave-guide (SIW) technology that microwave and millimeter wave circuit base proposes develops rapidly, it utilizes metallic vias on dielectric substrate, realize being similar to the field communication mode of waveguide, both there is the advantage of rectangular metal waveguide high quality factor and Low emissivity loss, possesses again microstrip line volume little, easy processing, the features such as cost is low, are widely used in radio frequency microwave system.
In the ordinary course of things, the test of radio system all adopts coaxial test macro, and at V-band (50-75GHz) even more high band, coaxial system is compared rectangular waveguide and cannot be met the demands in reliability and lossy, so substantially adopt rectangular metal waveguide test macro at V-band.Current rectangular waveguide is excessive to the switching technique insertion loss of substrate integration wave-guide, and bandwidth of operation is narrower, and complex structure, this brings very large obstruction to the development of microwave radio circuit, strongly limit design and the test of substrate integration wave-guide circuit.Therefore, the metal waveguide of broadband, low-loss, high reliability has very important Research Significance to the switching of substrate integration wave-guide.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of rectangular waveguide-trapezoidal and subtracts high transition-substrate integration wave-guide transducer, the advantages such as this transducer not only has easy processing, bandwidth, insertion loss is low, reflection coefficient is low.And reliable solution can be provided for the microwave radio circuit test of V-band even more high band.
Technical scheme: for achieving the above object, the technical solution used in the present invention is: a kind of rectangular waveguide-trapezoidal subtracts high transition-substrate integration wave-guide transducer, comprise special waveguide (1) and substrate integration wave-guide (4), described special waveguide (1) comprises upper and lower two metal shells, upper metal shell (2) offers and subtracts high waveguide slot (11), and lower metal shell (3) has the substrate slot (12) of mating with substrate integration wave-guide (4); Described substrate integration wave-guide (4) comprises rectangle substrate and the first trapezoidal substrate, and the long base of the first trapezoidal substrate is connected with one end of rectangle substrate; The described first trapezoidal substrate right side is top to bottm disposed with trapezoidal extension medium (10), trapezoidal metal level; Described rectangle substrate comprises the right top layer metallic layer (5), dielectric substrate (6), the bottom metal layer (7) that top to bottm set gradually, and on this rectangle substrate, being provided with plated-through hole (8), described plated-through hole (8) comprises longitudinal hole part (13) and cross through hole part (14); Described longitudinal hole part (13) comprises the first row plated-through hole that two rows are parallel to each other, and first row plated-through hole is mutually vertical with the parallel edges of the first trapezoidal substrate; Described cross through hole part (14) comprises two and comes second row plated-through hole on the same line, described second row plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and crossing with the top of adjacent first row plated-through hole, described second row plated-through hole parallels with the parallel edges of the first trapezoidal substrate simultaneously; Described substrate integration wave-guide (4) is arranged in substrate slot (12), and upper and lower two metal shells close mutually, describedly subtract high waveguide slot (11) end face and substrate slot (12) end face forms a waveguide mouth, complete the conversion of rectangular waveguide to substrate integration wave-guide.
Preferred: the described rectangle substrate relative other end that is connected with the first trapezoidal substrate is provided with the second trapezoidal substrate, and be provided with on the rectangle substrate of this end two come on the same line the 3rd row plated-through hole, described 3rd row's plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and crossing with the top of adjacent first row plated-through hole, described 3rd row's plated-through hole parallels with the parallel edges of the second trapezoidal substrate simultaneously.
Preferred: waveguide mouth one end sectional dimension of described special waveguide (1) is identical with sectional dimension in the waveguide mouth of the standard waveguide of corresponding frequency band work; Described high waveguide slot (11) vertical height that subtracts is decreased to zero from the gradual change of waveguide mouth end face, other end connects with the long base of trapezoidal extension medium (10), and transverse width is from waveguide mouth width gradual change to being greater than trapezoidal extension medium (10) long base length; The vertical direction degree of depth of described substrate slot (12) is identical with the thickness of substrate integration wave-guide (4), and transverse width is from waveguide mouth width gradual change to subtracting high waveguide slot (11) end face transverse width.
Preferred: to carry out equivalent described substrate integration wave-guide with the rectangular metal waveguide of filling same media; The computing formula of the equivalent waveguide width between described substrate integration wave-guide and the rectangular waveguide of filling same media is:
Wherein, s is adjacent two plated-through hole centre distances, and d is plated-through hole diameter, W
sIWfor described substrate integration wave-guide (4) longitudinal hole part (13) two ranked first plated-through hole two row center lines between distance, W
rWGfor the length of cross section broadside in corresponding equivalent filled media rectangular waveguide;
Or when adjacent two plated-through hole centre distance s are enough little, the computing formula of described equivalent waveguide width is:
Preferred: when operating frequency is at f
cto 2f
cbetween time, substrate integrated waveguide single mould transmit, only transmit accurate TE
10mould; Wherein, main mould cut-off frequency is
accurate TE
10the cut-off wavelength λ of mould
c=2W
rWG, c is the propagation velocity of electromagnetic wave at free space, μ
rfor dielectric substrate relative permeability, non-magnetic media μ
r=1, ε
rfor the relative dielectric constant of dielectric substrate.
Preferred: the center line of the first row plated-through hole be parallel to each other is arranged point-blank in described trapezoidal extension medium (10) center, long base and two; Described trapezoidal extension medium (10) long base length be greater than two of the longitudinal hole part (13) of described substrate integration wave-guide (4) ranked first plated-through hole two row center lines between distance W
sIW; And both sides are respectively greater than the distance of a plated-through hole.
Rectangular waveguide-trapezoidal assemble method subtracting high transition-substrate integration wave-guide transducer, first puts into substrate slot (12) by substrate integration wave-guide (4); Then upper and lower two metal shells are closed mutually and compress substrate integration wave-guide (4); Complete the conversion of rectangular waveguide to substrate integration wave-guide.
Beneficial effect: a kind of rectangular waveguide provided by the invention-trapezoidal subtracts high transition-substrate integration wave-guide transducer, compared to existing technology, has following beneficial effect:
1. special waveguiding structure used is compact, and assembling is simple, is convenient to connect.
2. substrate for use integrated waveguide and trapezoidal extension medium can utilize common PCB technology to process, cut, and are applicable to producing low-costly and in high volume.
3. transducer described in is enclosed construction, all entering from the electromagnetic wave entered the waveguide mouth of special waveguide trapezoidally subtracts in high transition structure, all subtract high transition structure enter substrate integration wave-guide from trapezoidal again, there is no electromagnetic leakage and radiation, thus all very little by interference extraneous and to external world.
4. described in, transducer working band is wide, and reflection coefficient is low, and insertion loss is low.In embodiment of the present invention, transducer is at whole V-band reflection coefficient <-15dB, and insertion loss <0.3dB, relative bandwidth reaches 40%.
Accompanying drawing explanation
Fig. 1 is that rectangular waveguide of the present invention-trapezoidal subtracts high transition-substrate integration wave-guide converter structure schematic diagram.
Fig. 2 is the processing structure figure of upper metal shell 2 in embodiment 1.
Fig. 3 is the processing structure figure of lower metal shell 3 in embodiment 1.
Fig. 4 is the PCB of the substrate integration wave-guide back-to-back structural representation of embodiment 1, wherein Fig. 4 a substrate integration wave-guide PCB vertical view back-to-back, and Fig. 4 b is the left view of part B in Fig. 4 a.
Fig. 5 is the S parameter performance of embodiment 1.
Have in figure: special waveguide 1, metal shell 2, metal shell 3, substrate integration wave-guide 4, top layer metallic layer 5, dielectric substrate 6, bottom metal layer 7, plated-through hole 8, substrate integrated waveguide medium 9, trapezoidal extension medium 10, trapezoidal metal level 101, subtract high waveguide slot 11, substrate slot 12, longitudinal hole part 13, cross through hole part 14.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of rectangular waveguide-trapezoidal subtracts high transition-substrate integration wave-guide transducer, at V-band, test transmission waits and often adopts metal waveguide, and microwave integrated circuit chip etc. still need to be bonded on pcb board, so need reliable adapting system to be connected with rectangular metal waveguide by PCB.As shown in Figure 1, this transducer comprises special waveguide 1 and substrate integration wave-guide 4, and described substrate integration wave-guide 4 is substrate integration wave-guide PCB., described special waveguide 1 comprises upper and lower two metal shells, and as shown in Figure 2, upper metal shell 2 offers and subtracts high waveguide slot 11, and as shown in Figure 3, lower metal shell 3 has the substrate slot 12 of mating with substrate integration wave-guide 4; Described substrate integration wave-guide 4 comprises rectangle substrate and the first trapezoidal substrate, and the long base of the first trapezoidal substrate is connected with one end of rectangle substrate; The described first trapezoidal substrate right side is top to bottm disposed with trapezoidal extension medium 10, trapezoidal metal level; Described rectangle substrate comprises the right top layer metallic layer 5, dielectric substrate 6, the bottom metal layer 7 that top to bottm set gradually, and plated-through hole 8 is provided with on this rectangle substrate, described plated-through hole 8 comprises longitudinal hole part 13 and cross through hole part (14), both separately line be 90 ° of vertical relations.Described longitudinal hole part 13 comprises the first row plated-through hole that two rows are parallel to each other, and first row plated-through hole is mutually vertical with the parallel edges of the first trapezoidal substrate; Described cross through hole part 14 comprises two and comes second row plated-through hole on the same line, described second row plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and crossing with the top of adjacent first row plated-through hole, described second row plated-through hole parallels with the parallel edges of the first trapezoidal substrate simultaneously; Described substrate integration wave-guide 4 is arranged in substrate slot 12, and upper and lower two metal shells close mutually, described in subtract high waveguide slot 11 end face and substrate slot 12 end face forms a waveguide mouth, complete the conversion of rectangular waveguide to substrate integration wave-guide.
Described dielectric substrate 6 utilizes the longitudinal hole part 13 of described top layer metallic layer 5, described bottom metal layer 7 and described plated-through hole 8 to form substrate integrated wave guide structure;
Dielectric substrate is made up of substrate integrated waveguide medium and trapezoidal extension medium, described substrate integration wave-guide is put into described substrate slot, make described trapezoidal extension medium laterally be positioned at substrate slot center, then two metal shells of described special waveguide are compressed described substrate integration wave-guide; Trapezoidal extension medium stretches into and subtracts among high waveguide, and the waveguide of common formation is to the transition structure of substrate integration wave-guide.The waveguide mouth of special waveguide is the size of the waveguide mouth of standard waveguide, therefore, can realize being communicated with of special waveguide and waveguide easily; By subtracting high waveguiding structure to standard waveguide to the transition of substrate integration wave-guide and impedance transformation effect, achieve broadband, low-loss, high reliability rectangular waveguide to the conversion of substrate integration wave-guide.
By upper and lower metal shell altogether after the size of waveguide mouth that formed, with in national standard needed for ordinary rectangular hollow metal waveguide measure-alike of working frequency range, its standard a nd norm is shown in GB GB-T11450.2-1989; The vertical depth of the substrate slot of special waveguide is identical with the thickness of substrate integration wave-guide, and namely dielectric thickness adds the thickness of double layer of metal.
The described rectangle substrate relative other end that is connected with the first trapezoidal substrate is provided with the second trapezoidal substrate, and be provided with on the rectangle substrate of this end two come on the same line the 3rd row plated-through hole, described 3rd row's plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and crossing with the top of adjacent first row plated-through hole, described 3rd row's plated-through hole parallels with the parallel edges of the second trapezoidal substrate simultaneously.
Waveguide mouth one end sectional dimension of described special waveguide 1 is identical with sectional dimension in the waveguide mouth of the standard waveguide of corresponding frequency band work; Describedly subtract high waveguide slot 11 vertical height and be decreased to zero from the gradual change of waveguide mouth end face, other end connects with the trapezoidal long base of extension medium 10, and transverse width is from waveguide mouth width gradual change to being greater than trapezoidal extension medium 10 long base length; The vertical direction degree of depth of described substrate slot 12 is identical with the thickness of substrate integration wave-guide 4, transverse width is from waveguide mouth width gradual change to subtracting high waveguide slot 11 end face transverse width, to guarantee to close described upper metal shell 2 and lower metal shell 3 after compressing described substrate integration wave-guide 4, the side and substrate slot 12 respective side edge that subtract high waveguide slot 11 in vertical direction do not have deviation.
Rectangular metal waveguide transmission TE
10mould, substrate integration wave-guide transmission class TE
10mould, both have similar character, and can carry out equivalent described substrate integration wave-guide with the rectangular metal waveguide of filling same media, the medium that this rectangular metal waveguide is filled is identical with the medium of described substrate integration wave-guide; Traditionally rectangular waveguide transmission theory, can calculate the length of the interior cross section broadside of corresponding rectangular metal waveguide; According to described length, and the computing formula of equivalent waveguide width between the rectangular waveguide of substrate integration wave-guide and filling same media, distance between the center line calculating two row's longitudinal metal through holes of described substrate integration wave-guide, ensure single mode transport in described substrate integration wave-guide, namely only propagate accurate TE
10pattern.Equivalent described substrate integration wave-guide is carried out with the rectangular metal waveguide of filling same media; The computing formula of the equivalent waveguide width between described substrate integration wave-guide and the rectangular waveguide of filling same media is:
Wherein, s is adjacent two plated-through hole centre distances, and d is plated-through hole diameter, W
sIWfor described substrate integration wave-guide 4 longitudinal hole part 13 two ranked first plated-through hole two row center lines between distance, W
rWGfor the length of cross section broadside in corresponding equivalent filled media rectangular waveguide;
Or when adjacent two plated-through hole centre distance s are enough little, the computing formula of described equivalent waveguide width is:
When operating frequency is at f
cto 2f
cbetween time, substrate integrated waveguide single mould transmit, only transmit accurate TE
10mould; Wherein, main mould cut-off frequency is
the main mould of substrate integration wave-guide, i.e. accurate TE
10the cut-off wavelength λ of mould
c=2W
rWG, c is the propagation velocity of electromagnetic wave at free space, μ
rfor dielectric substrate relative permeability, non-magnetic media μ
r=1, ε
rfor the relative dielectric constant of dielectric substrate.
As shown in Figure 4, described trapezoidal extension medium 10 is in a top view in trapezium structure, base is connected with described substrate integrated waveguide medium 9, center, base is relative with the center, sideline of the longitudinal hole part 13 of described plated-through hole 8, and base length is greater than the distance W between the center line of the cross through hole part 13 of described plated-through hole 8
sIW, both sides are greater than the distance of a through hole; Namely the center line of the first row plated-through hole be parallel to each other is arranged point-blank in described trapezoidal extension medium 10 center, long base and two; Described trapezoidal extension medium 10 long base length be greater than two of the longitudinal hole part 13 of described substrate integration wave-guide 4 ranked first plated-through hole two row center lines between distance W
sIW; And both sides are respectively greater than the distance of a plated-through hole, the better effects if when transition of mechanical impedance like this; Top layer metallic layer 5 only covers described substrate integrated waveguide medium 9, does not cover described trapezoidal extension medium 10, and namely described trapezoidal extension medium 10 upper part is exposed; Bottom metal layer 7 covers described substrate integrated waveguide medium 9 and described trapezoidal extension medium 10 simultaneously.Be beneficial to electromagnetic wave in substrate integration wave-guide progressively to diffuse to like this and subtract high waveguide; And lower floor is still coated with metal copper sheet, prevents from the one hand leaving air gap when embedding lower floor's housing, thus increase the discontinuity of changeover portion, Insertion Loss is increased, the mechanical strength of printed circuit board (PCB) can be strengthened on the other hand, prevent medium changeover portion from tilting.
As shown in Figure 4, because trapezoidal dielectric changeover portion base is greater than the distance of two row's plated-through holes, in order to prevent, in the medium outside electromagnetic wave leakage to two row's metal throuth holes, so increase horizontal metal throuth hole, namely increasing second, third row's plated-through hole.
Rectangular waveguide-trapezoidal assemble method subtracting high transition-substrate integration wave-guide transducer, first puts into substrate slot 12 by substrate integration wave-guide 4; Then upper and lower two metal shells are closed mutually and compress substrate integration wave-guide 4; Complete the conversion of rectangular waveguide to substrate integration wave-guide.
As shown in Figure 1, 2, 3, subtract high waveguide slot 11 in vertical direction and there is no deviation with substrate slot 12, the vertical direction degree of depth of described substrate slot 12 is identical with the thickness of described substrate integration wave-guide 4, therefore, described substrate integration wave-guide 4 is put into described substrate slot 12, just in time upper metal shell 2 and lower metal shell 3 can be fitted tightly; Upper metal shell 2 and lower metal shell 3 are compressed substrate integration wave-guide 4, the described special waveguide 1 of composition jointly of described upper metal shell 2 and lower metal shell 3, described in subtract the waveguide mouth that high waveguide slot 11 end face and substrate slot 12 end face form the standard rectangular waveguide that completes; Described standard waveguide refers to the ordinary rectangular metal waveguide of required working frequency range in national standard, and its standard a nd norm is shown in GB GB-T11450.2-1989; After completing above-mentioned steps, achieve the conversion of described standard rectangular waveguide to substrate integrated wave guide structure of described special waveguide 1.
Subtract high waveguide slot side in vertical direction and substrate slot extension respective side edge does not have deviation, when substrate integration wave-guide circuit board is put into lower metal shell, need trapezoidal extension medium is longitudinally being in the middle of substrate slot.
The conveniently connection of described special waveguide and standard waveguide, needs in the side of special waveguide respectively to open 4 screwed holes and 4 pin holes, and the size in described hole is identical with position with the size of respective aperture in standard waveguide ring flange with position; Described standard waveguide ring flange refers to the normal rectangular waveguide ring flange of required working frequency range, and state's label of its specification is GB-T11449.2-1989.Conveniently aim at upper and lower two metal shells, also need to open in upper-lower casing relevant position screwed hole and pin hole with compact siro spinning technology upper-lower casing.
Example
This example is for being applicable to V-band, and namely the waveguide-trapezoidal of 50GHz-75GHz subtracts high transition-substrate integration wave-guide converter structure.For the ease of test, the present embodiment design be that the waveguide-trapezoidal of back to back structure subtracts high transition-substrate integration wave-guide transducer.Substrate integration wave-guide PCB is equally also back to back structure, and respectively there is identical trapezoidal extension medium at two ends.Consider that high frequency nude film etc. still needs to carry out with micro-band gold wire bonding, increase air chamber structure at upper metal shell, convenient expansion increases the switching of substrate integration wave-guide to microstrip line.
The upper metal shell 2 of special waveguide 1 is of a size of 22.0mm × 30.0mm × 10.7mm, and lower metal shell 3 is of a size of 20.0mm × 34.8mm × 9.3mm, and material is copper, and upper metal shell central authorities increase air chamber structure, are of a size of 8.0mm × 8.0mm × 3.5mm.Subtract high waveguide slot in bottom surface projection in trapezoidal, two bases are respectively 3.795mm and 4.4mm, and longitudinal length is 12mm, and waveguide mouth end face vertical height is 1.61mm; The waveguide mouth of special waveguide 1 is of a size of 1.88mm × 3.759mm; Distance between the center line of two row's plated-through hole row of substrate integration wave-guide 4 is 2.7mm, and both sides respectively vertically extend three plated-through holes; Adjacent through-holes center distance is 0.6mm, and through-hole diameter is 0.4mm; Top layer and underlying metal layer thickness are 0.018mm; In the trapezoidal faces of trapezoidal extension medium, bottom is respectively 1mm and 4mm, is highly 5.5mm; Pcb board material used is Rogers5880, and dielectric thickness is 0.254mm, and relative dielectric constant is 2.2; At side opening screwed hole and the pin hole of special waveguide 1, the size in each hole described is identical with position with the size of respective aperture in the standard waveguide ring flange of V-band with position, so that with test waveguide connects, the specification of described V-band standard waveguide ring flange is shown in GB GB-T11449.2-1989; Relatively open screwed hole and pin hole at special waveguide 1 upper-lower casing and aim at fixing metal housing 2 and metal shell 3 to facilitate.
The emulation S parameter of the present embodiment is shown in Fig. 5.Result shows, and this transducer working frequency range is V-band, and whole V-band reflection coefficient <-15dB, insertion loss <0.3dB, relative bandwidth reaches 40% (50GHz-75GHz).The present embodiment achieve broadband, low insertion loss, low reflection coefficient the rectangular metal waveguide working in V-band-trapezoidal subtract high transition-substrate integration wave-guide transducer.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a rectangular waveguide-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: comprise special waveguide (1) and substrate integration wave-guide (4), described special waveguide (1) comprises upper and lower two metal shells, upper metal shell (2) offers and subtracts high waveguide slot (11), and lower metal shell (3) has the substrate slot (12) of mating with substrate integration wave-guide (4); Described substrate integration wave-guide (4) comprises rectangle substrate and the first trapezoidal substrate, and the long base of the first trapezoidal substrate is connected with one end of rectangle substrate; The described first trapezoidal substrate right side is top to bottm disposed with trapezoidal extension medium (10), trapezoidal metal level; Described rectangle substrate comprises the right top layer metallic layer (5), dielectric substrate (6), the bottom metal layer (7) that top to bottm set gradually, and on this rectangle substrate, being provided with plated-through hole (8), described plated-through hole (8) comprises longitudinal hole part (13) and cross through hole part (14); Described longitudinal hole part (13) comprises the first row plated-through hole that two rows are parallel to each other, and first row plated-through hole is mutually vertical with the parallel edges of the first trapezoidal substrate; Described cross through hole part (14) comprises two and comes second row plated-through hole on the same line, described second row plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and crossing with the top of adjacent first row plated-through hole, described second row plated-through hole parallels with the parallel edges of the first trapezoidal substrate simultaneously; Described substrate integration wave-guide (4) is arranged in substrate slot (12), and upper and lower two metal shells close mutually, describedly subtract high waveguide slot (11) end face and substrate slot (12) end face forms a waveguide mouth, complete the conversion of rectangular waveguide to substrate integration wave-guide.
2. rectangular waveguide according to claim 1-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: the described rectangle substrate relative other end that is connected with the first trapezoidal substrate is provided with the second trapezoidal substrate, and be provided with on the rectangle substrate of this end two come on the same line the 3rd row plated-through hole, described 3rd row's plated-through hole is arranged on the outside of the first row plated-through hole be parallel to each other, and it is crossing with the top of adjacent first row plated-through hole, described 3rd row's plated-through hole parallels with the parallel edges of the second trapezoidal substrate simultaneously.
3. rectangular waveguide according to claim 2-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: waveguide mouth one end sectional dimension of described special waveguide (1) is identical with sectional dimension in the waveguide mouth of the standard waveguide of corresponding frequency band work; Described high waveguide slot (11) vertical height that subtracts is decreased to zero from the gradual change of waveguide mouth end face, other end connects with the long base of trapezoidal extension medium (10), and transverse width is from waveguide mouth width gradual change to being greater than trapezoidal extension medium (10) long base length; The vertical direction degree of depth of described substrate slot (12) is identical with the thickness of substrate integration wave-guide (4), and transverse width is from waveguide mouth width gradual change to subtracting high waveguide slot (11) end face transverse width.
4. rectangular waveguide according to claim 3-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: carry out equivalent described substrate integration wave-guide with the rectangular metal waveguide of filling same media; The computing formula of the equivalent waveguide width between described substrate integration wave-guide and the rectangular waveguide of filling same media is:
Wherein, s is adjacent two plated-through hole centre distances, and d is plated-through hole diameter, W
sIWfor described substrate integration wave-guide (4) longitudinal hole part (13) two ranked first plated-through hole two row center lines between distance, W
rWGfor the length of cross section broadside in corresponding equivalent filled media rectangular waveguide;
Or when adjacent two plated-through hole centre distance s are enough little, the computing formula of described equivalent waveguide width is:
5. rectangular waveguide according to claim 4-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: when operating frequency is at f
cto 2f
cbetween time, substrate integrated waveguide single mould transmit, only transmit accurate TE
10mould; Wherein, main mould cut-off frequency is
accurate TE
10the cut-off wavelength λ of mould
c=2W
rWG, c is the propagation velocity of electromagnetic wave at free space, μ
rfor dielectric substrate relative permeability, non-magnetic media μ
r=1, ε
rfor the relative dielectric constant of dielectric substrate.
6. rectangular waveguide according to claim 5-trapezoidal subtracts high transition-substrate integration wave-guide transducer, it is characterized in that: the center line of the first row plated-through hole be parallel to each other is arranged point-blank in described trapezoidal extension medium (10) center, long base and two; Described trapezoidal extension medium (10) long base length be greater than two of the longitudinal hole part (13) of described substrate integration wave-guide (4) ranked first plated-through hole two row center lines between distance W
sIW; And both sides are respectively greater than the distance of a plated-through hole.
7., based on rectangular waveguide according to claim 1-trapezoidal assemble method subtracting high transition-substrate integration wave-guide transducer, it is characterized in that, comprise the following steps: first substrate integration wave-guide (4) is put into substrate slot (12); Then upper and lower two metal shells are closed mutually and compress substrate integration wave-guide (4); Complete the conversion of rectangular waveguide to substrate integration wave-guide.
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| CN113745785A (en) * | 2021-09-17 | 2021-12-03 | 上海交通大学 | Back-to-back transition structure from coplanar waveguide to dielectric waveguide |
| CN113839165A (en) * | 2021-09-16 | 2021-12-24 | 中国科学院空天信息研究院粤港澳大湾区研究院 | Transmission interconnection structure for matching terahertz waveguide and substrate integrated waveguide |
| CN113970670A (en) * | 2021-09-29 | 2022-01-25 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method |
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| CN112864560A (en) * | 2021-01-11 | 2021-05-28 | 博微太赫兹信息科技有限公司 | Transition conversion structure from substrate integrated waveguide to rectangular waveguide |
| CN113839165A (en) * | 2021-09-16 | 2021-12-24 | 中国科学院空天信息研究院粤港澳大湾区研究院 | Transmission interconnection structure for matching terahertz waveguide and substrate integrated waveguide |
| CN113839165B (en) * | 2021-09-16 | 2022-05-03 | 广东大湾区空天信息研究院 | Transmission interconnection structure for matching terahertz waveguide and substrate integrated waveguide |
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| CN113745785B (en) * | 2021-09-17 | 2022-04-15 | 上海交通大学 | Back-to-back transition structure from coplanar waveguide to dielectric waveguide |
| CN113970670A (en) * | 2021-09-29 | 2022-01-25 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method |
| CN113970670B (en) * | 2021-09-29 | 2022-08-09 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method, system, equipment, medium and terminal |
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